CN210118342U

CN210118342U - Evacuation heat dissipation eccentric shaft

Info

Publication number: CN210118342U
Application number: CN201920442281.4U
Authority: CN
Inventors: 廖弟腾; 廖皆平
Original assignee: Wolf Speed Enterprise Development Shenzhen Co ltd
Current assignee: Wolf Speed Enterprise Development Shenzhen Co ltd
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2020-02-28
Anticipated expiration: 2029-04-01

Abstract

The utility model discloses an evacuation heat dissipation eccentric shaft, including first axis body, the second axis body and third axis body, first axis body the second axis body and the third axis body connects gradually and the disalignment, the third axis is internal to have the third shaft chamber, be provided with cyclic annular radiating groove on the inner wall in third shaft chamber, be provided with on the third axis body and run through the through-hole of the lateral wall of third axis body, the both ends of through-hole are connected respectively the outside of third axis body with cyclic annular radiating groove. By arranging the annular heat dissipation groove and the through hole communicated with the annular heat dissipation groove, in the process of mounting the bearing, air between the bearing and the inner wall of the third shaft cavity is extruded to the outside of the third shaft cavity through the annular heat dissipation groove and the through hole, so that the pressure in the third shaft cavity is reduced, and the bearing can be conveniently mounted in the third shaft cavity; in the use process, the through holes can bring external air into the annular heat dissipation grooves, so that air circulation is increased, and heat dissipation is realized.

Description

Evacuation heat dissipation eccentric shaft

Technical Field

The utility model relates to an eccentric shaft technical field especially relates to an evacuation heat dissipation eccentric shaft.

Background

The workpiece with the excircle parallel to the axis of the excircle and not coincident with the axis of the excircle is called an eccentric shaft. The eccentric shaft is usually fixed on the rotating shaft of the motor through an eccentric hole, and when the motor is started, the eccentric shaft makes a cam motion. Therefore, the composite material is widely applied to automobiles, engines, pumps and the like. In mechanical transmission, the conversion of rotary motion into reciprocating linear motion or the conversion of reciprocating linear motion into rotary motion is generally accomplished by using eccentric parts. Such as a lubrication pump driven by an eccentric workpiece for a lathe headstock, a crankshaft in an automotive engine, etc. To facilitate adjustment of the center-to-center distance between the shafts, eccentric shafts are commonly used in flat-linkage vee-belt drives. The common shaft can only drive the workpiece to rotate, but the eccentric shaft can not only transmit rotation, but also transmit revolution.

The eccentric shaft is cooperation bearing work usually, need set up the bearing on the eccentric shaft in the use, and the cooperation mode of bearing and eccentric shaft is interference fit usually, and great external force just needs to be applyed to self assembling process, simultaneously, because still can persist the air between eccentric shaft and the bearing, air between the two can be compressed in the assembling process, leads to the unable smooth installation of bearing on the eccentric shaft.

It is therefore desirable to provide an eccentric shaft that solves the above mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: an evacuation heat dissipation eccentric shaft is provided which can solve the above technical problems existing in the prior art.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an evacuation heat dissipation eccentric shaft, includes first axis body, the second axis body and the third axis body, first axis body the second axis body and the third axis body connects gradually and the disalignment, the third axis is internal to have the third shaft chamber, be provided with cyclic annular radiating groove on the inner wall in third shaft chamber, be provided with on the third axis body and run through the through-hole of the lateral wall of the third axis body, the both ends of through-hole are connected respectively the outside of the third axis body with cyclic annular radiating groove.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, the annular heat dissipation groove is disposed at a middle position in an axial direction of the third shaft cavity.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, the width of the annular heat dissipation groove is larger than the diameter of the through hole.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, the through hole is formed by extending from the bottom of the annular heat dissipation groove to the outer wall of the third shaft body along the radial direction.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, the through hole is a tapered hole, and the diameter of the tapered hole gradually increases from the side wall of the third shaft cavity to the outer wall of the third shaft body.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, a stepped groove is formed at an end of the third shaft cavity close to the second shaft body.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, the first shaft body is provided with an edge groove centering circle.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, diameters of the first shaft body, the second shaft body, and the third shaft body sequentially increase.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, a process groove is disposed at a position where the third shaft cavity contacts with the second shaft body.

As a preferable technical solution of the evacuation heat dissipation eccentric shaft, the third shaft body is a camshaft.

The utility model has the advantages that: by arranging the annular heat dissipation groove and the through hole communicated with the annular heat dissipation groove, in the process of mounting the bearing, air between the bearing and the inner wall of the third shaft cavity is extruded to the outside of the third shaft cavity through the annular heat dissipation groove and the through hole, so that the pressure in the third shaft cavity is reduced, and the bearing can be conveniently mounted in the third shaft cavity;

in the use process, the through holes can bring external air into the annular heat dissipation grooves, so that air circulation is increased, and heat dissipation is realized.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic view of a first view angle structure of the evacuation heat dissipation eccentric shaft according to the first embodiment of the present invention.

Fig. 2 is an enlarged view at I in fig. 1.

Fig. 3 is a schematic view of a second view angle structure of the evacuation heat dissipation eccentric shaft according to the second embodiment of the present invention.

In the figure:

1. a first shaft body; 2. a second shaft body; 3. a third shaft body; 4. a third axial cavity; 5. an annular heat dissipation groove; 6. A through hole; 7. a stepped groove; 8. a process tank; 9. the side groove is divided into middle circles.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the term "connected" is to be construed broadly and "fixed", e.g., as a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-3, this embodiment provides an evacuation heat dissipation eccentric shaft, which includes a first shaft body 1, a second shaft body 2, and a third shaft body 3, where the first shaft body 1, the second shaft body 2, and the third shaft body 3 are sequentially connected and are not coaxial, a third shaft cavity 4 is provided in the third shaft body 3, an annular heat dissipation groove 5 is provided on an inner wall of the third shaft cavity 4, a through hole 6 penetrating through a side wall of the third shaft body 3 is provided on the third shaft body 3, and two ends of the through hole 6 are respectively connected to an outside of the third shaft body 3 and the annular heat dissipation groove 5.

By arranging the annular heat dissipation groove 5 and the through hole 6 communicated with the annular heat dissipation groove 5, in the process of mounting the bearing, air between the bearing and the inner wall of the third shaft cavity 4 is extruded to the outside of the third shaft cavity 4 through the annular heat dissipation groove 5 and the through hole 6, so that the pressure inside the third shaft cavity 4 is reduced, and the bearing can be conveniently mounted in the third shaft cavity 4;

in the use process, the through holes 6 can bring external air into the annular heat dissipation grooves 5, so that air circulation is increased, and heat dissipation is realized.

Preferably, the number of the through holes 6 is two, and the two through holes 6 are symmetrically arranged with respect to the axis of the annular heat dissipation groove 5.

As a preferable technical solution, the annular heat sink 5 is disposed at a middle position in the axial direction of the third axial cavity 4.

Further, the evacuation heat dissipation eccentric shaft has a width of the annular heat dissipation groove 5 larger than a diameter of the through hole 6.

Preferably, the through hole 6 extends from the bottom of the annular heat sink 5 to the outer wall of the third shaft body 3 in the radial direction.

Further, the through hole 6 is a taper hole, and the diameter of the taper hole gradually increases from the side wall of the third shaft cavity 4 to the outer wall of the third shaft body 3.

Further, a stepped groove 7 is formed in the end portion, close to the second shaft body 2, of the third shaft cavity 4.

As the evacuation heat dissipation eccentric shaft, the first shaft body 1 is provided with a side groove centering circle 9.

The diameters of the first shaft body 1, the second shaft body 2 and the third shaft body 3 are increased in sequence. And a process groove 8 is arranged at the contact position of the third shaft cavity 4 and the second shaft body 2. The third shaft body 3 is a camshaft.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The emptying and heat dissipation eccentric shaft is characterized by comprising a first shaft body, a second shaft body and a third shaft body, wherein the first shaft body, the second shaft body and the third shaft body are sequentially connected and are not coaxial, a third shaft cavity is formed in the third shaft body, an annular heat dissipation groove is formed in the inner wall of the third shaft cavity, a through hole penetrating through the side wall of the third shaft body is formed in the third shaft body, and two ends of the through hole are respectively connected with the outside of the third shaft body and the annular heat dissipation groove.

2. The eccentric shaft for evacuating heat dissipation according to claim 1, wherein the annular heat dissipation groove is provided at a middle position in an axial direction of the third shaft cavity.

3. The eccentric shaft for evacuating heat dissipation according to claim 2, wherein the width of the annular heat dissipation groove is larger than the diameter of the through hole.

4. The eccentric shaft for evacuating heat dissipation according to claim 3, wherein the through hole extends from the bottom of the annular heat dissipation groove to the outer wall of the third shaft body along the radial direction.

5. The eccentric shaft for evacuating and dissipating heat of claim 2, wherein the through hole is a tapered hole, and the diameter of the tapered hole gradually increases from the sidewall of the third shaft cavity to the outer wall of the third shaft body.

6. The eccentric shaft for evacuating and dissipating heat of claim 4, wherein the end of the third shaft cavity close to the second shaft body is provided with a stepped groove.

7. The eccentric shaft for evacuating and dissipating heat of claim 5, wherein the first shaft body is provided with a side groove centering circle.

8. The eccentric shaft for evacuating and dissipating heat of claim 6, wherein the diameters of the first shaft body, the second shaft body and the third shaft body are sequentially increased.

9. The eccentric shaft for evacuating and dissipating heat of claim 7, wherein a process groove is formed at a position where the third shaft cavity contacts the second shaft body.

10. The evacuated heat rejection eccentric shaft of claim 8, wherein the third shaft body is a camshaft.